Table 1.

Characteristics of patients commencing PD, according to APD exposure

FactorCAPD GroupAPD GroupP Value
Patients (n)27614198
RRT before PD992 (35.9)1603 (38.2)0.06
Age at PD start (yr)64.0 (52.0, 73.0)60.0 (48.0, 70.0)<0.001
Men1508 (54.6)2506 (59.7)<0.001
Race0.01
 Caucasian2066 (74.8)3219 (76.7)
 Indigenous257 (9.3)294 (7.0)
 Asian329 (11.9)512 (12.2)
 Other109 (3.9)173 (4.1)
Primary renal disease<0.001
 GN646 (23.4)1196 (28.5)
 Analgesic nephropathy82 (3.0)82 (2.0)
 Polycystic kidney disease164 (5.9)267 (6.4)
 Reflux nephropathy75 (2.7)166 (4.0)
 Hypertension428 (15.5)569 (13.6)
 Diabetic nephropathy963 (34.9)1306 (31.1)
 Other235 (8.5)364 (8.7)
 Uncertain168 (6.1)248 (5.9)
BMI (kg/m2)26.1 (22.8, 30.1)26.2 (22.8, 30.0)0.95
Smoking at RRT entry0.99
 Never1322 (48.0)2008 (47.9)
 Former1080 (39.2)1641 (39.2)
 Current352 (12.8)539 (12.9)
Diabetes1234 (44.7)1716 (40.9)0.002
Coronary artery disease1114 (40.3)1531 (36.5)0.001
Peripheral vascular disease751 (27.2)942 (22.4)<0.001
Chronic lung disease455 (16.5)607 (14.5)0.02
Cerebrovascular disease444 (16.1)561 (13.4)0.002
PET at baseline (4-h dialysate/plasma creatinine)a0.69 (0.14)0.69 (0.14)0.29
  • Data are presented as n (%) or median (interquartile range). The CAPD group never received APD, whereas the APD group received APD at least once. APD, automated peritoneal dialysis; BMI, body mass index; CAPD, continuous ambulatory peritoneal dialysis; PD, peritoneal dialysis; PET, peritoneal equilibrium test.

  • a Missing in 29% of cohort. All other values missing in <1%.